JPH0450786Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a door lock device, and in particular, in an opening/closing body such as a vehicle door, a latch and a striker are engaged with each other before the door is completely closed. The present invention relates to a door lock device configured to later forcibly move these doors in the direction of completely closing the door.

<Conventional technology> In order to prevent rainwater from entering the vehicle interior,
A seal member called a weather strip is provided in the gap between the door and the vehicle body. In order to further enhance the sealing effect and reduce wind noise and wind leakage noise, the pressure reaction force of this weather strip tends to be increased, which may force an increase in the closing operation force or cause the door to suddenly close. This causes inconveniences such as the sound generated by the door closing operation and excessive changes in the air pressure inside the vehicle.

In order to eliminate this inconvenience, the striker is configured to be movable back and forth along the door opening/closing direction, and the latch and striker are engaged at a position where the pressing reaction force of the weather strip does not act. After this, a door lock device was developed in 1982, which forcibly moved a striker in the direction of closing the door using a signal from a door switch that caused the interior light to flicker.
-Proposed in Publication No. 144173.

On the other hand, as a drive device for linearly reciprocating a striker, etc., a cam follower capable of linear sliding is circumscribed on the circumferential surface of a circular cam having an eccentric shaft, the cam is rotationally driven by an electric motor, and this rotational movement is It is preferable to use a mechanism in which this is converted into a linear motion with a stroke corresponding to the amount of eccentricity of the camshaft via a cam follower.

<Problems to be solved by the invention> However, while the above-mentioned eccentric cam mechanism can provide reciprocating motion to the cam follower by simply rotating the electric motor in a single direction, even if the power to the motor is cut off, Since the motor continues to rotate to a certain extent due to inertial force, and the stopping position depends on the friction of various parts, it is difficult to accurately stop the cam follower at a predetermined position.

Based on this viewpoint, the main purpose of the present invention is to provide a door lock device equipped with a moving device such as a striker that uses an eccentric cam mechanism and is improved so as to obtain high stopping position accuracy. It is in.

<Means for Solving the Problems> According to the present invention, the present invention provides a latch device and a striker that can be engaged with each other before an opening/closing object such as a door is completely closed, and a latch device and a striker that can be engaged with each other before an opening/closing object such as a door is completely closed. A lock device comprising a drive device for moving at least one of the opening/closing bodies along the opening/closing direction of the opening/closing body, the drive device including a rotary motor, a cam rotationally driven by the motor, and a cam. a cam follower that engages with the cam follower to perform a linear reciprocating motion, and the limit of movement of the latch device or the striker is comprised of an arcuate slot concentric with the center of rotation of the cam, and a pin that projects into the slot. This is achieved by providing a door lock device characterized by:

<Function> In this way, the movable member such as the striker can be reliably stopped at the specified position without being affected by external factors such as changes in temperature or overrun of the electric motor.

<Embodiments> Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows the main parts of a vehicle door 1 to which a door lock device according to the present invention is applied, and shows a space 3 inside a curved rear end surface 2 of the door with the door inner panel 1a facing the door outer panel 1b. for,
A striker drive device 8 is attached to a space 7 inside the front end surface 6 of the center pillar or rear pillar of the vehicle body 5 where the ratchet type latch mechanism 4 is attached and the body outer panel 5a is bent toward the body inner panel 5b. has been done. Further, a weather strip 9 is attached to the corner of the rear end surface 2 of the door, and when the door is closed, the weather strip 9 comes into close contact with the corresponding surface of the body outer panel 5a, so that the required sealing effect can be obtained. has been done.

The striker drive device 8 includes a U-shaped striker 10 protruding from the front end surface 6 of the body outer panel 5a, a cam mechanism 11 for moving the striker 10 along the opening/closing direction of the door 1, and a cam mechanism 11 for rotating the cam mechanism 11. It consists of a driving speed reducer 12 and a DC motor 13, and is fixed to the vehicle body 5 at a casing 14 portion of the cam mechanism 11.

On the other hand, the latch mechanism 4 is of a known type,
Rotary latch 4 internally engaged with striker 10
When the door is closed, the striker 10 is bitten and held, and when the door is opened, the striker 10 is released by operating a door handle (not shown).

As clearly shown in FIG. 2, the casing 14 of the cam mechanism 11 is screwed to the front end surface 6 of the body outer panel 5a via a mounting bush 15 made of an elastomer material. Thereby, the operation noise of the striker drive device 8 can be effectively blocked from being transmitted to the vehicle body 5.

On the mounting surface of the casing 14 to the vehicle body 5,
A guide groove 16 extending in the opening/closing direction of the door 1 is recessed. A slide member 17 is slidably mounted in the guide groove 16, and an outer surface 17a of the slide member 17 is exposed through an opening 18 formed in the front end surface 6. And this outer surface 1
A base plate 19 on which the above-described striker 10 is fixed is screwed to 7a using bolts 19a.

The base plate 19 is slidably displaced together with the slide member 17, and is formed so as to overlap the opening 18 over the entire sliding range. A self-lubricating seal member 20 is interposed on the inner peripheral edge of the opening 18 so as to be sandwiched between the slide member 17 and the base plate 19, thereby reducing the transmission of operating noise to the vehicle body 5. At the same time, moisture and the like are prevented from entering the interior of the vehicle body 5 through these sliding surfaces.

A boss 21 is provided protruding from the inner surface of the slide member 17. The boss 21 projects into an elongated hole 22 formed at the bottom of the guide groove 16 of the casing 14 in parallel with the guide groove 16 . Further, on the inner surface of the casing 14, a guide groove 16 and a long hole 2 are provided.
A guide recess 23 extending in the same direction as 2 is recessed, and a cam follower 24 is slidably mounted thereon.

The cam follower 24 is fixed to the end surface of the boss 21 that passes through the elongated hole 22 and is exposed on the inner surface of the guide recess 23 using a countersunk bolt 25. As a result,
The slide member 17 and the cam follower 24 are prevented from coming off from the casing 14 and are movable within a range defined by the elongated hole 22.

As shown in FIGS. 1 and 3, at both ends of the inner surface of the cam follower 24 in the sliding direction, there are a pair of inner walls 26a extending perpendicularly to the sliding direction.
26b has been launched. A circular eccentric cam 27 is inscribed in both inner walls 26a and 26b.
is provided. The outer circumferential surface of the eccentric cam 27 is coated with a coating 2 made of a self-lubricating resin material.
7a, so that the cam follower 24 can smoothly slide into contact with both inner walls 26a, 26b.

A speed reducer 12 is fixed to the inner end surface of the casing 14 .

As shown in FIG. 4, the reducer 12 includes a cam shaft 2 with an eccentric cam 27 keyed to the end of the shaft.
8, a final stage gear 29 integrally fixed to the camshaft 28, a plurality of transmission gear groups 30 provided so as to mesh with the final stage gear 29, and a cam via these transmission gear groups 30. A pinion gear 31 fixed to the shaft end of the DC motor 13 to drive the shaft 28
The rotational force of the electric motor 13 is appropriately decelerated and then transmitted to the camshaft 28.

The final stage gear 29 has an arcuate slot 32 which is concentric with the camshaft 28 and extends at an angle of approximately 180 degrees. A pin 33 whose both ends are fixed to the casing 14 passes through the slot 32, thereby defining the rotation angle of the final stage gear 29. A coating 32a made of a resin material is also applied to the inner peripheral edge of the slot 32, thereby preventing the generation of metallic sounds.

Next, the operation procedure of the above embodiment will be explained.

First, in the completely closed state, the eccentric cam 27 and the final gear 29 are in the rotational positions shown in FIGS. 3 and 4, and the striker 10 is inside the vehicle body 5 shown in the actual battle in FIG. positioned. When the door handle is operated from this state, the striker 10 is released from the rotary latch 4a. At this time, for example, the displacement of the door handle or the accompanying movement of each part of the latch mechanism 4 is detected by a limit switch or the like, and the electric motor 13 is controlled to rotate in the normal rotation direction.

As the electric motor 13 rotates in the normal direction, the eccentric cam 27 rotates clockwise in FIG.
Move the cam follower 24 to the left. As the cam follower 24 moves to the left, the slide member 1
7 and the striker 10 are moved along the guide groove 16 to a forward position outside the vehicle interior (imaginary line in FIG. 1).

When the final stage gear 29 rotates and one inner end of the slot 32 hits the pin 33, the electric motor 13 is mechanically stopped and the striker 10 is held in the forward position. At the same time, the stall current of the electric motor 13 at this time is detected and the electric motor 13 is electrically stopped. In that case, for example, stoppage of the electric motor 13 may be detected using a trich limiter or the like, and power supply to the electric motor 13 may be cut off.

Next, when the door 1 is closed from this state, since the striker 10 is located on the outside of the vehicle body after the above process, the weather strip 9 provided on the door 1 side is rotated before it is pressed and deformed. A fully latched state is achieved between the latch 4a and the striker 10. In this state, although it is in a fully-latched state, it appears to be in a so-called ajar state,
Since this is before the pressing reaction force of the weather strip 9 becomes large, the fully latched state can be achieved with a relatively small force for closing the door. Incidentally, reference numeral 44 indicates a cushion member provided on the base plate 19 of the striker 10 so as to come into elastic contact with the casing end surface of the latch mechanism 4 when the door is closed.

Next, rotation of the latch member 4a to the fully latched position or contact between the latch mechanism 4 and the striker 10 is detected by a limit switch or the like, and the DC motor 13 is controlled in the reverse direction based on this signal.

As the electric motor 13 reverses, the eccentric cam 27 moves to the third position.
The slide member 17 and the striker 10 along with the cam follower 24 rotate to the position shown in the figure.
is forcibly slid toward the interior of the vehicle along the guide groove 16, and the completely closed state shown in FIG. 1 is again realized.

When the eccentric cam 27 rotates through the angle determined by the slot 32 and pin 33, the pin 33 abuts against the other inner end of the slot 32 in the same manner as described above, and the striker 10 is held in the retracted position and the Similarly, the stall current of the electric motor 13 at this time is detected and the electric motor 13 is stopped.

Now, in the above-mentioned eccentric cam mechanism, a problem arises in the means for setting the stop position of a reciprocating member such as a striker. That is, in order to improve the accuracy of the stop position in a mechanism that converts rotational motion into reciprocating motion, it is preferable to provide a stopper at a location where the stroke is expanded as much as possible.

Therefore, in the present invention, as shown in the above embodiment, an arc-shaped slot 32 is provided in the final stage gear 29 that is concentric with the eccentric cam 27, and the pin 33 inserted into the slot 32 is inserted into the casing 14. The above-mentioned problems are solved by fixing them. That is, the stroke of the striker 10 can be appropriately expanded by the radius of the slot 32, and the rotation angle of the camshaft 28 can be easily and firmly defined.

Incidentally, level difference adjustment for adjusting the installation between the vehicle body and the door is generally performed at the mounting position of the striker 10. In this case, the bolts 19a fixing the base plate 19 are loosened and the position of the striker 10 relative to the vehicle body 5 is changed within the range of the hole 19b drilled in the base plate 19.
Since the striker 7 and the base plate 19 of the striker 10 are separate bodies, the position of the striker 10 can be adjusted regardless of the mounting position of the drive device main body 8.

Incidentally, in the above embodiment, the final stage gear 29 has a slot 3.
2 is provided, however, a pin may be provided upright on the final stage gear, and a slot into which the free end of this pin can enter may be provided recessed on the casing side.
Regarding the stop control of the electric motor, in addition to the torque control described above, the rotation of the electric motor may be constantly monitored using a pulse transmitter or the like.

Furthermore, the present invention is not limited to the above-mentioned door, but can equally be applied to a tailgate, trunk lid, etc.

<Effects of the invention> As described above, according to the invention, it is possible to improve the stopping position accuracy of the driven side member such as the striker with an extremely simple structure, thereby increasing the reliability of this type of door lock device. It has a big effect on the top. Furthermore, since excessively high mechanical precision is not required, it is also effective in simplifying quality control.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing how a door lock device for an automobile according to the present invention is attached to a door and a vehicle body. FIG. 2 is a partially cutaway view of the striker drive device in the direction of the arrows in FIG. 1. FIG. FIG. 3 is a view taken along the - line in FIG. 1. FIG. 4 is a view taken along the - line in FIG. 1. 1...Door, 1a...Door inner panel, 1b
... Door outer panel, 2 ... Door rear end surface, 3
... Space, 4 ... Latch mechanism, 4a ... Rotary latch, 5 ... Vehicle body, 5a ... Body outer panel, 5b ... Body inner panel, 6 ... Front end surface, 7 ... Space, 8 ... Striker drive device, 9
... Weather strip, 10... Striker,
DESCRIPTION OF SYMBOLS 11...Cam mechanism, 12...Reducer, 13...Electric motor, 14...Casing, 15...Mount bush, 16...Guide groove, 17...Slide member, 17a...Outer surface, 18...Opening , 19... Base plate, 19a... Bolt, 19b... Hole, 20... Seal member, 21... Boss, 22
...Elongated hole, 23...Guide recess, 24...Cam follower, 25...Countersunk bolt, 26a, 26b...
Inner wall, 27... Eccentric cam, 27a... Covering, 28
...Camshaft, 29...Final gear, 30...Transmission gear group, 31...Pinion gear, 32...Slot, 32a...Coating, 33...Pin, 44...Cushion member.

Claims (1)

[Claims for Utility Model Registration] A latch device and a striker that can be engaged with each other before an opening/closing body such as a door is completely closed, and at least one of the latch device and the striker is arranged along the opening/closing direction of the opening/closing body A lock device having a driving device for moving the lock device, the driving device having a rotary motor, a cam rotationally driven by the motor, and a cam follower that engages with the cam and performs a linear reciprocating motion. Also, a door lock device characterized in that the limit of movement of the latch device or the striker is defined by stopper means comprising an arcuate slot concentric with the center of rotation of the cam and a pin projecting into the slot.